Should this code draw a line?

#include 
#include 
#define WIN32_LEAN_AND_MEAN
#define _RGB16BIT(r,g,b) ((b%32)+((g%32)<<5)+((r%32)<<10))



/* Declare Windowsprocedure */
LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);
/* Make the classname into a global variable */
char szClassName[ ] = "Project1";
int WINAPI WinMain(HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nFunsterStil)

{
    HWND hwnd;               /* This is the handle for our window */
    MSG messages;            /* Here messages to the application is saved */
    WNDCLASSEX wincl;        /* Datastructure for the windowclass */

    
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;     
    wincl.style = CS_DBLCLKS;             
    wincl.cbSize = sizeof(WNDCLASSEX);

   
    wincl.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor(NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL; 
    wincl.cbClsExtra = 0;                  
    wincl.cbWndExtra = 0;                     
    
    wincl.hbrBackground = (HBRUSH) GetStockObject(LTGRAY_BRUSH);

    
    if(!RegisterClassEx(&wincl)) return 0;

    
    hwnd = CreateWindowEx(
           0,                  
           szClassName,         
           "Project 1",         
           WS_POPUP | WS_VISIBLE, 
           CW_USEDEFAULT,       
           CW_USEDEFAULT,       
           0,               
           0,                 
           HWND_DESKTOP,        
           NULL,                
           hThisInstance,       
           NULL                 
           );


    ShowWindow(hwnd, nFunsterStil);
	

    while(GetMessage(&messages, NULL, 0, 0))
    {

           DispatchMessage(&messages);
    }

	LPDIRECTDRAW lpdd;
	DDSURFACEDESC ddsd;

	LPDIRECTDRAWSURFACE lpddsprimary;


	if(DirectDrawCreate(NULL, &lpdd, NULL) != DD_OK)
	{
		MessageBox(hwnd, "The Bastard Didn''t Work", "Damnit", MB_OK);
		DestroyWindow(hwnd);
	}
	lpdd->SetCooperativeLevel(hwnd, DDSCL_ALLOWMODEX | DDSCL_FULLSCREEN | DDSCL_EXCLUSIVE | DDSCL_ALLOWREBOOT);
	lpdd->SetDisplayMode(640, 480, 8);
	ddsd.dwSize = sizeof(ddsd);
	ddsd.dwFlags = DDSD_CAPS;
	ddsd.dwFlags = DDSD_CAPS;
	ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;

	if(lpdd->CreateSurface(&ddsd, &lpddsprimary, NULL)!=DD_OK)
	{
		MessageBox(hwnd, "The Bastard Didn''t Work", "Damnit", MB_OK);
		DestroyWindow(hwnd);
	}

	memset(&ddsd, 0 ,sizeof(ddsd));
	ddsd.dwSize = sizeof(ddsd);


	lpddsprimary->Lock(NULL, &ddsd, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WAIT, NULL);
	UCHAR *video_buffer;

	video_buffer = (UCHAR *)ddsd.lpSurface;
	int x = 50;
	int y = 100;

	for(int i = 0; i < 20; i++)
	{
		video_buffer[(x + i) + (y*ddsd.lPitch >> 1)] = (USHORT)_RGB16BIT(100,200,100);
	}


	Sleep(1000);

	   	lpddsprimary->Unlock(ddsd.lpSurface);	
		if(lpddsprimary)
				lpddsprimary->Release();
		if(lpdd)
				lpdd->Release();
		
	

    return messages.wParam;
}

/* This function is called by the Windowsfunction DispatchMessage( ) */
LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)                  /* handle the messages */
    {
           case WM_DESTROY:
           PostQuitMessage(0);        /* send a WM_QUIT to the messagequeue */
           break;




		   case WM_CHAR:
		
			PostQuitMessage(0);
			break;




           default:                   /* for messages that we don''t deal with */
           return DefWindowProc(hwnd, message, wParam, lParam);
    }
    return 0;
}